| floridatrust.org | Florida Trust For Historic Preservation |
| cambridge.ma.us | Cambridge Historical Commission (cambridge, Massachusetts, Usa) |
| chs.org | The Connecticut Historical Society |
| californiapreservation.org | California Preservation Foundation |
| assonetriver.com | Friends of Historic Preservation |
| uiuc.edu | Building Research Council, School of Architecture, University of Illinois Urbana |
| historiclandmarks.org | Historic Landmarks Foundation of Indiana |
| historichawaii.org | Historic Hawaii Foundation |
| georgiatrust.org | The Georgia Trust for Historic Preservation |
| dcpreservation.org | DC Preservation League |
, ,